非undefined的参数拼接

const arr1 = [
      { key: "cycleType", value: iperiod },
      { key: "indexId", value: iid }, 
      { key: "indexLevel", value: ilevel },
      { key: "indexName", value: iname },
      { key: "orgName", value: iunit },
      { key: "queryDate", value: startEndTime }
      
    ];

const arr2: any = [];
arr1.map(e => {
    if(e.value) {
        arr2.push(e)
    }
    return e;
});

const arr3: any = [];
for(let i = 0; i < arr2.length; i++){
    const subString = `${arr2[i].key}='${arr2[i].value}'`;
    arr3.push(subString)
};

const sqlstr = arr3.join("&");